ok vs o.k.

ok and o.k. both are adjectives.

Word	Noun	Adjective	Verb	Adverb
ok	No	Yes	No	No
o.k.	No	Yes	No	No

As adjectives, ok and o.k. are synonyms defined as:

Other synonyms of ok include all right, cool, fine, hunky-dory, okay.

ok (adjective)	o.k. (adjective)
being satisfactory or in satisfactory condition	being satisfactory or in satisfactory condition